Meaning of “form” - Learner’s Dictionary

form

noun uk us /fɔːm/
TYPE [ C ]

B2 a type of something or way of doing something:

Swimming is the best form of exercise.
PAPER [ C ]

A2 a printed document with spaces for you to write information:

Please fill in/out the form using black ink.
the form of sth

the particular way in which something exists:

The novel is written in the form of a series of letters.
The medicine comes in the form of a liquid or pills.
SPORT [ U ]

In sport, someone's form is how well or badly they are performing:

The team seems to have lost its form lately.
be in/on/off form UK

If someone is in form or on form, they are feeling or performing well, and if they are off form they are not feeling or performing well:

Harry was on good form last night.
SCHOOL GROUP [ C ] UK (US grade)

B1 a school class or group of classes for students of the same age or ability:

He's in the third form.
SHAPE [ C ]

the body or shape of someone or something

GRAMMAR [ C ]

B1 a way of writing or saying a word that shows if it is singular or plural, past or present, etc:

The plural form of 'sheep' is 'sheep'.
→ See also application form , sixth form

(Definition of “form noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)